Both are Bluetooth receivers, $199 against $219. This page puts them side by side on the only three things a maker can be held to — power, output impedance and noise — and then asks the question that actually matters: which headphones do they treat differently?
The FiiO BTR7 reaches 100 dB on 565 of the 567 models here, the iFi GO blu on 563.
| Specification | FiiO BTR7 | iFi GO blu |
|---|---|---|
| Power into 32Ω | 160 mW | 165 mW |
| Power into 150Ω | 35 mW | 35 mW |
| Power into 300Ω | 18 mW | 18 mW |
| Power into 600Ω | 9.0 mW | 8.8 mW |
| Output impedance | 1.2 Ω | 1.0 Ω |
| Output noise | 3.0 µV | not published |
| Price | $199 | $219 |
| Headphones it reaches 100 dB on out of 567 | 565 | 563 |
A figure marked not published is missing from the maker’s own material, which is not the same as being good or bad. Where one of these two publishes a number and the other does not, the comparison on that axis cannot be made at all — and saying so is more useful than guessing.
2 headphones reach 100 dB on the FiiO BTR7 but not on the iFi GO blu — Symphonium Crimson, Symphonium Helios.
23 headphones are left alone by the iFi GO blu under the one-eighth rule but coloured by the FiiO BTR7 (64 Audio Ocean, 64 Audio U18s, 64 Audio U6t, 20 more).
563 of the 567 models here reach 100 dB on both. That is a power count and nothing more; whether either source suits a given headphone also depends on the two lines above.
Each has a page of its own with every power figure traced to what the maker published and a full headphone list: FiiO BTR7 and iFi GO blu. Or put either against your own headphones in the source comparison tool.